HEAVY-DUTY REINFORCED NYLONMetal Pivot Spring for Extra Durability, Strength and Reliability. Those clamps are suitable for both heavy duty and light weight scenarios, making these clamps very easy to work with and tough enough to get the job done. COMFORTABLE ERGONOMIC ROUNDED GRIPFinger friendly handles for Pain-Free Easy Opening. Non-slip patterns on rounded handles increase the friction force whilst remaining comfortable for users to grip. Both handles feature a hole for strings hanging requirements. MULTIPLE APPLICATIONS Suitable for photo paper, muslin backdrops, reflectors or other photography accessories, woodworking or art work. Can be used at home, outdoors, background photography and in the studio, very practical. Quantity delivered: 3 pieces Package Contents: Only the above package contents, excluding other products. Size: 11.5*8.5cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.